Angular ngControlStatus(有效、无效、原始、脏等)不在<;选择>;
我正在尝试进行一些表单验证,出于某种原因,当我尝试在myTest.pristine的条件下向select添加一个类时,什么也没有发生。但是,这在常规输入上运行良好。请看我下面的例子Angular ngControlStatus(有效、无效、原始、脏等)不在<;选择>;,angular,angular2-forms,angular-forms,angular4-forms,control-state,Angular,Angular2 Forms,Angular Forms,Angular4 Forms,Control State,我正在尝试进行一些表单验证,出于某种原因,当我尝试在myTest.pristine的条件下向select添加一个类时,什么也没有发生。但是,这在常规输入上运行良好。请看我下面的例子 <div class="form-group" [class.has-error]="hasPrimaryLanguageError && primaryLanguage.pristine"> <label>Primary Language *</label>
<div class="form-group" [class.has-error]="hasPrimaryLanguageError && primaryLanguage.pristine">
<label>Primary Language *</label>
<select class="form-control" #primaryLanguage name="primaryLanguage" [(ngModel)]="model.primaryLanguage">
<option value="default">Select a Language...</option>
<option *ngFor="let lang of languages">{{ lang }}</option>
</select>
<div *ngIf="hasPrimaryLanguageError && primaryLanguage.pristine" class="alert alert-danger">Required</div>
</div>
初级语言*
选择一种语言。。。
{{lang}}
要求的
您的默认值需要为空,即:
<option value="">Select a Language...</option>
所以你的最终代码是
<div class="form-group" [class.has-error]="hasPrimaryLanguageError && primaryLanguage.pristine">
<label>Primary Language *</label>
<select class="form-control" #primaryLanguage name="primaryLanguage" [(ngModel)]="model.primaryLanguage" required>
<option value="">Select a Language...</option>
<option *ngFor="let lang of languages" value="{{yourlanguaugeid}}">{{ lang }}</option>
</select>
<div *ngIf="hasPrimaryLanguageError && primaryLanguage.pristine" class="alert alert-danger">Required</div>
</div>
初级语言*
选择一种语言。。。
{{lang}}
要求的
进一步研究后,我发现我的#primaryLanguage没有设置为等于ngModel。这解决了我的问题
<div class="form-group" [class.has-error]="hasPrimaryLanguageError && primaryLanguage.pristine">
<label>Primary Language *</label>
<select class="form-control" #primaryLanguage name="primaryLanguage" [(ngModel)]="model.primaryLanguage" required>
<option value="">Select a Language...</option>
<option *ngFor="let lang of languages" value="{{yourlanguaugeid}}">{{ lang }}</option>
</select>
<div *ngIf="hasPrimaryLanguageError && primaryLanguage.pristine" class="alert alert-danger">Required</div>
</div>